Electric controller.



BEST AvAaLABLE com VW. WALZ. ELECTRIC CONTROLLER. APPLICATION FILED PEB. 10, 1909.

Patented Dec. 28, 1909.

3 SHEETS-SHEET 1.

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BEST AvAfLABLE com W. WALZ.

ELECTRIC GONTROLLEB. APPLIOATION FILED PEB. 1o, i909;

Patented Dec. 2s, 1909.

a SHEETS-imm 2.

BEST AVAILABLE COF` W. WALZ.

ELECTRIC CONTROLLER.

. APPLICATION FILED IEB.- 10, 1909. A 944,525. 'Patented pag.28, 1909.

3 SHEETS-SHEET 3.

Best AVM/BLE COP,

UNITED sTATEs PATENT onirica.

WILLIAM WALZ, OF TORONTO, ONTARIO, CANADA.

ELECTRIC CONTROLLER.

Application filed February 10, 1909.

To @It whom it may concern:

Be it known that I, XVILLIAM VALZ, a subject of the King of Great Britain, and resident of the city of Toronto, countyof York, Province of Ontario, in the Dominion of Canada7 have invented certain new and useful Improvements in Electric Controllers, of which the following is a specification.

The invention relates to improvements 1n electric controllers, as described in the following' specification and illustrated in the accompanying drawings that form partof the same.

The invention consists essentially in the novel formation and arrangement of parts, whereby in the arrangement of contacts and wiring any number of motors may be operated in parallel, and whereby certain novel constructional details lead to the above and result in an improved controller.

The objects of the invention are, to prevent further injury to a temporarily disabled motor7 to materially increase the efficiency in operation, to effect a greater convenience in installation and repairs and generally to provide a controller to overcome the various difliculties incident to the starting and stopping of motor operated vehicles.

Figure 1 is a perspective view of the controller showing the cover in its open position. Fig. 2 is a vertical sectional view of the controller. Fig. 3 is a rear elevation of the controller showing the cover partially broken away. Fig. 4 is a diagrammatic view showing the plan of wiring in a motor operate-d vehicle and the connections to the controller. Fig. 5 is an enlarged sectional perspective detail of the lever connections and locking mechanism. Fig. 6 is a cross sectional view through the roll shown in Fig. 5 showing the means for limiting the movement of said rolls. Fig. 7 is an enlarged perspective detail of a contact linger and contact. Fig. 8 is a cross sectional view of the controller through the line c--b Fig. 2.

Like characters of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 is the controller back rigidly secured to the base 2 and having the vertical slots 3 therethrough and the pairs of lugs 4 extending from the side edges.

Specification of Letters Patent.

Patented Dec. 28, 1909.

Serial No. 477,089.

5 are small eye bolts arraiiged in pairs and pivotally secured on the pins 6 extending through the lugs 4, said bolts having thumb-nuts threaded on their outer ends.

7 is the central rigid section of the back portion of the controller casing having the hole S therethrough mid-way ofkits height.

9 is a plate preferably of wood secured to the outside of the section 7 over the hole 8 and having a central hole 10 therethrough of smaller dimensions than the hole S. v

11 and 12 are the side sections of the back of the casing hinged to the central section 7 and having the forwardly extending iiang'es 13 and 14 and the slotted lugs 15 extending outwardly from said flanges, each of said lugs being arranged to receive one of each of the pairs of bolts 5.

16 is the curved front portion of the casing having the slotted lugs 17 extending outwardly from its side edges and arranged to receive the other of the pairs of bolts 5. The front and side sections of the hack of the casing are thus held closed by the said bolts 5.

18 is the top of the casing suitably secured to the controller back 1 and closing in the compartments 19 and 20 formed within the said casing, said top having the journal orifices` 21 and 22 therethrough.

23 are uprights of wood or other suitable insulating material secured in the compartment 19 between the back 1 and the central section 7 by the cap screws 24 extending through said section 7 and. having a plurality of horizontal wire slots 25 therethrough arranged in a vertical row.

2G are strips of wood or other suitable insulating material inserted inthe slots 3 in the back 1 and suitably secured to the said back and having a number of horizontally arranged holes 27 therethrough corresponding with the wire slots 25 in the uprights 23.

28 are strips of insulating material arranged within the compartment 19 and overlapping the edges of theslots 3 and having holes registering with the holes 27k in the strips 26.

29 are bolts extending through the holes 27 and having flanged heads 30V secured to the strips 26.

31 are terminals supported on the extending ends of the bolts 29 and clamped securely against the insulating' strips QSYby the nuts 32, said terminals being formed to aast' Aramees com `squared portions 36, said fingers being piv- Votally secured to the lugs 33 and extending outwardly therefrom to their fork-shaped outer ends 39.

40 are the contact pieces of said fingers 7 pivotally supported in said forked ends 39, t vsaid contact pieces being arc-shaped and having the rearwardly projecting tongues 4l eX- tending into the openings 42 at the back of the said forked ends, said tongues limiting the movement of said contact pieces.

43 are spiral springs encircling the pins 34 and abutting the outer side of the bolt heads 30 and the slotted lever ends of the fingers 37, thus keeping a constant pressure on said ends and swinging the contact pieces of the said fingers into their Contact positions.

The pins 34 are held from turning by the slotted lever ends of the lingers 37 but they Vmay be adjusted as desired by swinging the said fingers outwardly against the spring pressure until the squared portion is free of the slot in the said lever end and when said squared portion is free, the pin may be adjusted in the threaded hole in the bolt head.

44 is the main controller roll carried on the spindle 45, said spindle being journaled in the orifice 2l in the top and in a suitable bearing in the bottom of the casing, said spindle extending above the top of the casing and operated by a key 4G. The roll 44 is divided into top and bottom sections 47 and 4S joined by the metal cylinder 49, said metal cylinder inclosing the blow out coil 50, the latter encircling the spindle 45.

5l is a contact partially surrounding the roll 44 adjacent to the top end thereof above the metal cylinder 49 and connected to the blow out coil 50 by the wire 52, said contact 51 being engaged by the corresponding fing On the brass cylinder 49 are mounted the contacts R1, R2, R3, Rt, R5, RG, RT and RS in consecutive running position as clearly shown in the diagrammatic View in F ig. 4, said contacts co-acting with the fingers 37 on suitable wire connections and bringing the speed of the vehicle gradually up to the highest running position with the motors connected in series parallel.

As the vehicle reaches the highest speed with the motors in series, the contactin vertical alinement with the contact RS brought into contact with the finger 37 which here may be designated as T1, said finger T1 being electrically connected with the contact finger correspondiiig and co-acting with the contact 5l, the latter finger for descriptive purposes being here designated as T, said finger T being electrically connected directly to the trolley feed. In this ruiming' position, that is to say, with the contacts 53 and RS in contact with their cor responding fingers and the motors in series parallel, the blow out coil 50 is cut out, thus preventing any over-heating in said blow out coil. l

54, 55, 5G and 57 are contacts corresponding to the contacts R5, R, R7 and RS and having rheostat connections through their corresponding fingers and arranged to bring the motors gradually into parallel ruiming posi tion. The contact 53 in vertical alinement with the contact 57 on the metal cylinder 4S) corresponds exactly in its function with the contact 53, thus the blow out coil is only in use while the controller is being turned.

59 and G0 are contacts mounted on the plate 61 immediately below the metal cylinder 49, said contacts 59 and G0 being bridged at G2.

rIhe fingers 37 co-acting` with the contacts 59 and (30 are here designated as fingers A and B.

63 and 64 are contacts mounted on the plate 65, the contact 63 being in horizontal alinement with the contact 59 and the contact G4 being in a co-acting position with the finger 37, which is here designated as contact finger C, said contacts 63 and 64 being bridged at 6G.

67, 68, 69 and 70 are contacts mounted on the plate 71, said contacts 67, G8, 69 and 70 co-acting with the fingers 37 which are here designated as C. D. E. and F, the Contact 67 being in horizontal alinement with the Contact 64 and the contact G3 partially surrounding the roll. The contacts 67 and GS are bridged at 72, the contacts 63 and 69 at 73 and the contacts 68 and 70 at 74.

75 is the reverse roll mounted on the spindle 7 6, and turning` therewith, the said spindle being journaled in the orifice 22 in the top 18- of the casing and in a suitable bearing in the bottom of the casing and operated by the key 77 as customary.

7 8 is a roll loosely mounted on the spindle 7 G below the reverse roll 75 and separated from said reverse roll by the insulating washer 7 9, and having contacts thereon and forming a switch. The roll 73 is held stationary in two different positions and may be moved to either of its positions by the lever 30 secured thereto.

81, S2, 33 and 84 are groups of contacts arranged on the reverse roll 75 as customary BEST AVMLABLE BOW in controller construction, said groups each having four contacts electrically connected in inner and outer pairs and engaging the fingers 85 in different pairs.

86 are contacts co-acting with the fingers S for reversing the direction of travel of the vehicle. The lingers 85 are precisely of the same construction and arrangement to the fingers 37, though the connections are through the other strip 20, consequently making different connections. The fingers 85 for convenience of description are here designated as A A2, F2, A2 and S7 making contact with the group of contacts 81; 88, A4, F* and A A* making contact with the group of contacts S2; A1, F1, A A1 and 89 making contact with the group of contacts 83, and 90; A A3, AF3 and A3, making contact with the group of contacts 84C. 91, 92, 93, 911, and 95 are fingers co-acting with the contacts on the roll switch 78.

90 is a contact mounted on the roll 78 and co-acting with the lingers 91 and 92 in the ordinary running position, that is to say, with the motors in series parallel.

97 and 98 are contacts co-acting with the fingers 92, and 93 and 94 and 95 respectively, the said contacts 97 and 98 being adapted to arrange the connections in such a manner as to run any number of motors in parallel.

99 is a dog pivotally secured intermediate of its length to the controller back 1 toward the lower end thereof and having its rounded end spring held outwardly by the spring 100.

101 is a cam secured to the roll switch 78 here shown arranged diametrically opposite the lever 80 and engaging the rounded end of the dog 99 and pressing the said end inwardly against said spring, consequently tilting the opposite squared end of said dog outwardly.

102 is a stop secured to the lower end of the roll 1-1 in alinementwith the squared end of the dog 99.

The cam 101 is so arranged on the roll switch 78 that when the contacts 97 and 9S are engaging their co-acting fingers the squared end of the dog 99 is moved so as to engage the stop 102 so that the main roll cannot be moved beyond the first running position, that is, with the contacts RS and in contact with their corresponding fingers. 1n the ordinary running position the roll switch is turned so that the contact 96 is in engagement with the fingers 91 and 92, consequently the main roll may be turned to bring all of its contacts into operation.

103 is a bracket secured to one of the strips near to the top end.

10-1 is a dog pivotally secured in the bracket 103 having a roller 105 journaled on the pin projecting' upwardly from the end thereof.

100 is a ring secured to the top end of the main roll '-11 and correspondingly notched to the contacts on the said roll,l the roller 105 engaging said ring in said notches and spring held to the ring by the spring 107.

108 is a ring secured on the top of the main roll and having a notch 109 therethrough. Y

110 is a cam secured on the top of the reverse roll 75 and having suitable faces.

111 is an arm pivotally secured in the lugs 112 from the controller back 1 having a finger 113 at one end thereof adapted to extend into the notch 109 and at the other end having a jaw 11-1 in which the roller 115 is jonrnaled, said arm being spring held with the roller engaging the faces of the cam 110 and said cam moving the finger 113 into the notch 109 for the purpose of locking said main roll when the reverse roll is turned to the off position.

110 is an upright metal bar secured to the bottom of the controller casing toward the front side thereof.

117 is a. strip of insulating. material covering' the bar 116 at the inner side thereof.

11S are insulating plates extending inwardly from the strip 11.7 to the main roll 1st between the contacts arranged on said roll to prevent arcing therebetween. l

The blow out coil surrounding the spindle 15 magnetizes said spindle and also the controller back 1 and upright bar 116 The magnetizing of said spindle, back and upright forms a further preventative to arcing between the contacts and contact fingers.

M1, M2 M2 and M4 are the motors of the vehicle.

R is the rheostat.

C B1, C B2, C B3 and C B* are circuit breakers, each having four connections and a double cut-out. The arrangement of the cut-outs is not explained herein as the construction of the circuit breakers forms a separate invention.

In the wiring plan 119 is a wire connecting the trolley to the contact finger T, the said finger T being' bridged as explained with the contact fingers T1.

12o, 121, 122, les, iet, 125, ies am le? are wires connecting' the contact fingers cotively with the rheostat R in steps, the nger co-acting with the contact RS being bridged with the contact finger A as previously mentioned.

12S is a wire connecting the contact iinger A. with the circuit breakers C B1 and C B3 in multiple.

129 and 130 are wires connecting thecircuit breakers C Bl and C B3 with the .contact fingers 39 and 90 respectiXf'ely.

131 and 132 are wires connecting the contact fingers A1 and A2 with the armatures of the motors M1 and M2 respectively.

which are preferably constructed of iron.

acting with the contacts R1 to BS respec- 133 and 134 are wires connecting the opposite brush of the armatures of the niotors M1 and M3 with the contact fingers A A1 and A A2 respectively.

135 and 13G are wires connecting the con tact fingers Fl and F2 with the fields of the inotors'M1 and M2 respectively.

137 and 133 are wires connecting the ends of the fields of said motors with the circuit breakers C B1 and C B2 respectively.

139 is a wire connected in multiple t0 the wires 135 and 13S through the circuit breakers C B1 and C B2 respectively and connecting said wires with the contact finger D of the main controller.

140 is a wire connecting the contact finger C with the contact finger 91.

141 is a wire connecting the contact finger 92 with the circuit breakers C B2 and C B'L in multiple.

142 is a wire connected through the circuit breaker C B2 with the wire 141 and to the contact finger 37.

143 is a wire connected through the circuit breaker C B* with the wire 141 and to the contact finger 33.

144 and 145 are wires connecting the contactfingers A A2 and A A4 with the armatures oi the motors M2 and M2 respectively.

146 and 147 are wires connecting the contact fingers of the armatures of the motors M2 and M2 with the contact fingers A2 and A4 respectively.

14S and 149 are wires connecting the contact fingers F2 and F'1 with the fields of the motors M2 and ML respectively.

150 and 151 are wires connecting the ends of the fields of the motors M2 and M4 with the circuit breakers C B2 and C B2 respectively.

152 and 153 are wires connected through the circuit breakers C B2 and C B2 with the wires 150 and 151 respectively and connected in multiple with the contact finger 94 and through the wire 154 to the ground.

155 is awire connecting the contact finger B with the contact finger 93.

15S-.is a wire connecting the contact finger E with the contact finger 94 and the ground wire 154.

157 is a wire connecting the contact finger F with the contact finger 95.

In the op-eration of this controller the current fiowing from the trolley through the wire 119 reaches the contact 51 through the contact finger T on the turning of the main roll to the first position and 'from said contact the current flows through the blow out coil to the contact R1 and through the cor responding contact finger to the wire 120, thus bringing in all of the resistance of the rheostat R. The current then flows from said rheostat through the wire 127 to the contact finger corresponding with the contact R2 and as said contact finger is bridged to the contact finger A, the current flows on through the wire 128 to the circuit breakers C B1 and C B, said circuit breakers being connected in multiple as explained. From the circuit breakers C B1 and C B3 the current flows through the wires 129 and 130 to th-e contact fingers 89 and 90 and through said fingers reaching the groups of contacts 83 and 84 respectively. The outer of the contacts of each of' said groups being electrically connected together conduct the current to the contact fingers A1 and A3 respect-ively from whence the current flows through the wires 131 and 132 to the armatures of the motors Ml and M3. rThe current then flows from the armatures of the said motors through the wires 133 and 134 to the contact fingers A A1 and A A3 respectively. The inner pairs of contacts of the groups S3 and 34 making Contact with the fingers A A1 and A A3 carry the current to the contact fingers F1 and F2 respectively. Frein the contact fingers F- and F"i the current fiows through the wires 135 and 136 to the fields of the motors M1 and M3 and from the fields through the wires 137 and 133 back to the circuit breakers C B1 and C B2.

The wires 137 and 138 are connected in multiple with the wire 139 through said circuit breakers C Bl and C Bi and the current is carried by said wire 139 to the contact finger D. y y As the contact finger D is electricaliy connected with the contact GS on the plate 71 the current flows through the bridge 72 and contact G7 to the Contact finger C and from the contact finger C through the wire 140 to the contact finger 91.

rfhe Contact 9G in the ordinary ruiming position makes an electrical connection between the contact fingers 91 and 92, thus the current flows from the contact fing-er 92 through the wire 141 to the circuit breakers C B2 and C B'l in multiple and from said circuit breakers to the contact fingers 87 and 8S through the wires 142 and 143 respectively.

`The Contact fingers 37 and 38, being in contact with the groups of contacts 81 and 32 on the reverse roll, carry the current to the contact fingers A A2 and A A4 from whence it flows through the wires 144 and 145 to the armatures of th-e motors M2 and M4 respectively.

The return current from the motors M2 and M2 is carried through the wires 146 and 147 to the contact fingers A2 and A4 and flowing through the inner pairs of contacts of the groups 31 and 82 continues through the contact fingers F2 and F2 through the wires 14S and 149 to the fields of' the motors M2 and M4. The current on passing through the fields of the motors N 2 and M" fiows through the wires 150 and 151 to the circuit breakers C B2 and C B2 and through said ZEST AV any knowledge of the numerous combinations of connections in order to run his car. It will thus be seen that any three of the motors in a four motor car may be operated in direct parallel connection if one motor is damaged instead of having to cut out a pair of motors as is the case with the ordinary series parallel motor controller.

The novel feature of the construction of the controller casing and the arrangement of the wiring therein is very important.- The various wires are secured in a perinanent position in the uprights 23 and if desired the main portion of the controller may be removed without disarrangement of the wires, it being simply necessary to remove the cap screws extending through said uprights and disconnect the back l from the base and the wires from the terminals, access being had to said terminals by swinging the side sections ll andv l2 outwardly on their hinges. rIhis arrangement not only allows the main roll and the contact fingers to be removed ca bloc, but allows the ready access to any of the parts, so that repairs may be very easily and quickly made.

All of the electrical connections are contained within the controlled casing and a great saving of time in making repairs is effected.

The novel construction of the contact fingers allows a very wide range of adjustment as the pins 34 may be adjusted in or out as far as desired. The contact pieces swinging in the forked ends of the contact fingers adjust themselves to the contacts on the controller roll and always maintain a perfect contact with a considerable area of contact surface. The projecting tongues extending from the back of the contact pieces prevent their swinging too far.

In arranging the blow out coil in the interior of the main roll great economy of space is effected and the said roll may be made of considerably greater diameter than any of the present forms of controllers. This allows a much greater number of contacts vfor rheostat positions.

The placing of the blow out coil within the controller roll localizes the magnetism in such a way that arcing between the contacts is entirely eliminated.

That I claim as my invention is:

l, In an electric controller, the combination with a plurality of motors, of a plurality of circuit breakers each electrically connected individually with one of said motors and electrically connected together in series parallel and to an electric current supply, means for controlling the flow of current to said circuit breakers, and means independent of said controlling means for connecting all of said circuit breakers and their corresponding motors in parallel.

2. In an electric controller, a plurality of grasas cosi circuit breakers electrically connected to an electric current supply, a plurality of motors electrically connected individually to said circuit breakers, means interposed between said circuit breakers and the current supply for controlling the flow of current to said circuit breakers and motors, and means independent of said controlling means interposed between said circuit breakers for changing the electrical connections of all of said circuit breakers to parallel.

3. In an electric controller, the combination with a plurality of motors and an electric current supply, of a plurality of stationary contacts, a plurality of co-acting movable contacts, a plurality of circuit breakers individual respectively to said motors, wiring connecting a pair of said circuit breakers in multiple, wiring connecting a pair of said motors individually in series with said pair of circuit breakers through certain of said co-acting contacts, wiring connecting another pair of said circuit breakers in multiple to the return from the aforesaid pair of circuit breakers otherwise in series parallel, wiring connecting the latter pair of circuit breakers to another pair of motors individually in series, and means independent of said controlling means interposed in the wiring between said pair of circuit breakers for instantaneously connecting all of said motors in parallel.

4. In an electric controller, the combination with a plurality of motors and an electric current supply, of a plurality of stationary contacts, a plurality of co-acting movable contacts, a plurality of circuit breakers individual respectively to said motors, wiring connecting a pair of said circuit breakers in multiple, wiring connecting a pair of said motors individually inA series with said pair of circuit breakers through certain of said co-acting contacts, a second pair of circuit breakers connected in multiple, wiring connecting the second pair of circuit breakers with a second pair of motors individually in series, a switch having a single contact coacting with stationary contacts electrically connected to the return wire from the rst pair of circuit breakers and to the lead to the second pair of circuit breakers and connecting all of said circuit breakers in series par! allel, said switch also having a pair of contacts co-acting with two other pairs of stationary contacts, wiring connecting a pair of the latter stationary contacts with the electric current supply and with the latter pair of circuit breakers, and wiring connecting the other pair of said latter stationary contacts with the return from the irst pair of circuit breakers and with the ground.

5. In an electric controller, the combination with a plurality of motors and an electric current supply, of a casing, a main roll rotatably mounted in said casing, a succeseggligaimsre cotei sion of contacts mounted on said inain roll, a plurailityof contacts mounted on said main rol-'l in addition to said succession of contacts, a plurality of contactfingers supported from said casing and establishing an electrical connection between said succession of conta-cts and said -additional contacts, a resistance, wiring from certain of said contact fingers to said resistance, a plurality of circuit breakers, `Wiring from certain of 'said contact vlingers to said circuit breakers, a reverse roll, aplurality -of contacts in groups on said reverse'roll having pairs in each group 4electrically connected, -a plurality of contact fingers supported from said casing and' cola-cting Vwith the contacts'on said reverse roll, a roll switch suitably supported in saidc'asing, va'. single contact on said rol switch, a pair of lcontacts on said roll switch, a plurality ofcont'actngers supported from said casing and 'co-'actingwit'h the' contacts on'said*rol'l`fswitch, wiring from certain of said reverse roll contact ingers to said circu'-1tbreakers,w1r1ngfrom other of vsald re- Verse ro'lllc'ontact fingers to said motors, wiring fromsaid :motors tosaidlcircuit breakersgwtirinfglfrom'certain 'of said roll switch contact fingersfto' *saidV circuit breakers and tolthel ground, wiing'from other of said roll s-Witchcontact Y "lingers to `the contact fingers co-'actiflfg'Lwith the additional contacts- Lon said niainiollincludin'g'a ground wire, and a main 4electrica-l lconductor'fconnected to certain loff'said main roll vcontact fingers andleadingfrorn vsaid electric current supply.

v6. :In .an -electric controller, the combination with la plurality of motors andan electric' current supply, of a casing, a main roll rotatably mounted Ain said casing, a contact extending partially around said roll, a pair of contactY lingers supported from said casing and electrically bridged and connected to said electric current supply the upper of said fingers engaging said contact, a succession of contacts mounted on said' main roll in steps and electrically connected together, one of said succession of contacts being elongated and extendinvr partially around said roll,v a plurality of: contacts in successive steps'monnted on said roll below said elongated contact and arranged in circumferential alinement with the contacts in the first succession, said latter contacts being electrically connected to the former succession, single .contacts arranged in longitudinal alinement with the last of cach of said sets of contacts and electrically connected therewithand co-act-ing with the second of said pairv of contact lingers, a blow out coil carried on said main roll and surrounding the spindle thereof having one terminal electrically connected to the first mentioned 'contact on said roll and its other terminal electrically connected to vthe remaining of the before-mentioned contacts on said roll, va resist-ance, a plurality of contact fingers electri-cally connected to said resistance and co* acting with said successive contacts, a contact Enger bridged to the last of the afore said contact fingers, a plurality of circuit breakers in corresponding numbers to said motors, wiring' connecting certain of said circuit breakers to the latter bridged contact finger in multiple, a. plurality of contacts on said main roll insulated from the aforesaid contacts, -a plurality of contact fingers coacting with the latter contacts, a roll switch suitably journaled in said casing, a single Contact mounted on said roll switch, a pair of contacts mount-ed on said roll switch, contact lingers co-acting with said contacts on said roll switch, 'wiring connecting certain of the contact lfingers co-acting with the insulated contacts on said main vroll with certain of the 'contact iingers co-a'cting with the contacts on said roll switch and with a ground wire, wiring connecting one of said contact fingers co-acting with said single contact on said roll lswitch with other of said circuit breakers in multiple, .a reverse roll, contacts on said reverse roll, contact iingers co-acting with 'the contacts on said reverse roll,"wiring connecting certain of said reverse roll contact fingers `with said circuit breakers, wiring connecting 'other of said reverse ro'll 'lingers with said motors, and ,connect-ing 'certain of said circuit breakers with -a ground wire.

7.1In an electric controller, the combina.- tion with 'a plurality `of motors and an electric current supply, of casing, a main roll rotatably mounted in said casing, a succession of contacts mounted on said roll, a contact linger electrically connected with the electric current supply and co-acting with one of said succession of contacts, a resistance, a plurality of contact fingers connected with said resistance and co-acting with the remainder of said succession of contacts, a contact finger bridged to the last one of the lingers co-acting with the succession of contacts, a pair of contacts mounted on said main roll and electrically connected together and insulated from the aforesaid contacts, one of said pair of contacts co-acting with said bridged contact linger, a pair of contacts insulated from the aforesaid contacts mounted on said roll and electrically connected together, one of said contacts being arranged in circumferential alinement with the first of the aforesaid pair and the other being out of alinement with the second of the aforesaid pair, a plurality of contacts mounted on said main roll and electrically connected together and insulated from the aforesaid contacts, the rst one being arranged in circumferential alinement with the second one of the second pair the second one `of the latter' set `extending around the -roll the full length of the first one and to BEST AVAiLABLE CUF` the full length of the second one of the second pair, the third one being arranged substantially in longitudinal alinement with the second one of the second pair and the last one being arranged in longitudinal alinement with the first one and of substantially. the same length, a contact finger co-acting with the second of the first pair of contacts, a contact finger co-acting with the first of the third set of contacts and the second of the second pair in succession, a Contact nger coacting with the secondof the third setof con-4 tacts, a contact finger co-acting with the thirdy of the third set of contacts, and a contact finger co-actingiwith the last of the third set of contacts, a roll switch suitably mounted in said casing, asinglecontact mounted on said roll switch, a pair of contacts mounted on said roll switch, ya contact finger. co-acting with said single contact and electrically. connected with the iingerco-acting with .the first ofthe third lset of contacts on themain roll, a contact finger co-actingwith the. first of thepairvof,contactsonsaid roll .switch and electricallyjconnected with the Contact finger co-acting with the second of the'l first pair of contacts on the main roll, a contact finger co-acting with the second contact on said vroll switch yand electrically'I connected with the contact fingerl co-acting withthe third contact of the'thirdfisetof contacts, on the main roll, a contact fingenco-acting with the second contact on .the rollswitch andelectrically connected. :with the contact finger co-'acting withfthe lastV contactgof fthe third set of contacts on .the main roll, a pair of circuit breakers, a wire 'connecting said pair of circuitbreakers in multiple Awith the contactv ngersco-acting with the first of the first pair of separated contacts on thev main roll, a wire connecting said pair of circuit breakers in multiple with the contact finger co-acting with t-he second of the third set of insulated contacts on the main roll, a second pair of circuit breakers, a wire connecting said second pair of circuit breakers in multiple with a contact finger co-acting with the first. of the pair of contacts on the said roll switch, a wire connecting said circuit breakers in multiple with the contact finger co-acting with the second of the pair of contacts on the said roll switch and to a ground wire, a reverse' roll, aplurality of contacts on said reverse roll arranged in groups and wired in pairs in each group, contact fingers co-acting with said contacts on said reverse roll, wiring connecting certain of the contact fingers of said reverse roll with said circuit breakers, wiring connecting the armatures of said motors to certain of said tingers of said reverse roll, wiring connecting one end of the fields of the said motors with said reverse roll fingers, and wiring connecting the other ends of the elds of said motors with said circuit breakers.

t5. In an electric controller, a base, a back secured to said base and having vertical slotstherethrough, a central rigid plate secured to said base behind said back and havingl an opening therethrough, side sections hinged to said central plate having forwardly extending flanges, a front plate secured to said back, a top covering the top of said front, back and side plates, strips of insulating material arrangedbetween said rigid central plate and said back and having a. plurality of' horizontal wire slots therethrough, stripsof insulating material Secured in the vertical slots in said back, terminals secured to the latter strips, contact so fingers secured in the latter strips and connected to said terminals, avmain roll journaled in suitable bearings,-and a reverse roll journaled-in said suitable bearings.

y9. In an `electric controller, a casing, a main roll, a reverse roll, a pair of insulating strips in said casing, a plurality of bolts secured A'in said stripsvhaving-lugs projecting from the Iheads thereofA and v4pivot holes in said lugs, a plurality of contact finders pivotally; supported .onsaidlugs and having slotted lever.` inner vends yand orkshaped outer ends and openings atthe back of said forked ends, pins threaded in threaded orifices in said bolt heads and having .squared portions fitting in thevslot's inthe lever ends of said fingers and fixed heads, spiral springs encircling the said pins and holding said lever ends outwardly against the heads of said pins, and arc-shaped contact pieces pivotally secured in the forked ends of said contact fingers and having tongues projecting into the openings in the backof said fingers.

l0. In an electric controller, a casing, a spindle mounted in suitable bearings in said casing, a roll of non-conducting material mounted on said spindle, a cylindrical metal casing secured to said roll and forming a chamber around said spindle, a cylindrical cap of non-conducting material mounted on 11o said spindle and closing the top of said chamber, a blow out coil encircling said spindle and inclosed with in said chamber, said coil being electrically connected at one end to said metal casing, a contact secured to said cylindrical cap and electrically connected to the other end of said magnet coil,

a plurality of contacts secured to said metal casing, a contact finger electrically connectp ed with an electric current supply and coacting with the contact secured to said cap,

a plurality of contact fingers adapted to coact with the contacts on said metal cylinder,

a plurality7 of electric motors, and wiring electrically connecting the latter contact ngers with said motors. v

ll. In an electric controller, the combination with a plurality of motors and a suitable rheostat, of a main roll suitable journaled and having a plurality of contact points arranged in steps thereon and electrically Connected together, a plurality of Astationary contacts electrically connected to said motors through said rheostat and adapted to oo-aot with the contacts on said main roll to feed the current to said motors in series parallel arrangement, and means operated independently of said main roll and interposed between said rheostat and said motors and adapted to change the electrical Connections from all of the step up of said main roll.

Signed at the city of Toronto, county of 15 York, Province of Ontario, in the Dominion of Canada, this seventh olay of January,

fitnesses A. DENNISON, E. HERON.

VILLIAM WALZ. 

